Full list of all 41 Bodycount achievements worth 1,000 gamerscore. It takes around 15-20 hours to unlock all of the achievements on Xbox 360.
Defeated K-8 Nemesis Widowmaker
Single player challenge complete on normal
Single player challenge complete on easy
Broke down the enemy's door
Medic Population Diminished
Achieved all objectives in Asia
Scavenger Population Diminished
Achieved all objectives in Africa
killed 10 enemies through cover
Killed 10 enemies while health is low
Survived K-8 Nemesis Widowmaker encounter
Killed 10 enemies with mines
OSB Airstrike upgraded
Killed 3 enemies at once with a single grenade
OSB Pulse Wave upgraded
Achieved Sniper Distance Kill
Skillkill x10
Killed 10 enemies with explosives
Killed 10 enemies from behind
OSB Explosive bullets upgraded
Killed 10 enemies with grenades
OSB Adrenaline upgraded
Induction Completed
Killed 10 enemies using melee
Killed 10 enemies with a headshot
Complete Single player campaign on hard
Collect highest value Intel following multiple skillkills
Kill 10 enemies with the last round in your weapon
Surprise kill 10 enemies
Skillkill 25 enemies in a row
Kill 5 enemies at once with an Airstrike
Kill 50 enemies in a co-op mode siege
Kill 100 enemies in a co-op mode siege
Survive the Militarised Compound siege
Survive the Pirate Bay siege
Survive the Mine siege
Survive the Street siege
Win a Deathmatch
Win a Team Deathmatch
Win 10 Deathmatches of any type
Score 1000 online kills